Make no mistake about it.... Microsoft Corporation is your worst enemy. There's not enough room to expand and expound on all the thoughts and topics that come to mind. But here's one that you should know about if you use MS Internet Explorer as your web browser.
Here is a link to a NEWMEDIAWHORE article that provides some interesting information on the stealth tracking built into that software. Sure, it's something that can be worked around.... but I think it's the INTENT that matters. You decide.